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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 84 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .2452304836979342 | 4.613e-08 | |
| a | 2.741242273974196 | 7.5432e-09 | au |
| q | 2.069006105194279 | 1.2711e-07 | au |
| i | 24.95110908196228 | 6.6736e-06 | deg |
| node | .05680417330341347 | 1.0471e-05 | deg |
| peri | 55.38107250215689 | 1.6027e-05 | deg |
| M | 19.4087170102262 | 1.0876e-05 | deg |
| tp | 2458911.125446550131
(2020-Mar-02.62544655) | 5.0003e-05 | TDB |
| period | 1657.751989737406
4.54 | 6.8426e-06
1.873e-08 | d
yr |
| n | .217161555062905 | 8.9636e-10 | deg/d |
| Q | 3.413478442754114 | 9.393e-09 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
8.2 |
|
n/a |
MPO492751 |
IRAS observations used: 17 |
| diameter |
diameter |
130.935 |
km |
0.505 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
| rotation period |
rot_per |
12.093 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List:
[Schober, H.J.; Surdej, J. (1979) Astron. Astrophys. Suppl. Ser. 38, 269-274.]
[Harris, A.W.; Young, J.W. (1980) Icarus 43, 20-32.]
[Pilcher, F.; Delos, S.; Ahrendts, G.; Barker, T. (2012) Minor Planet Bull. 39, 204.]
[Garlitz, J. (2013) Posting on CALL web site. http://www.minorplanet.info/call.html]
[Behrend, R. (2015) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.] |
| geometric albedo |
albedo |
0.064 |
|
0.012 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
| B-V |
BV |
0.691 |
|
0.014 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=6; phase (min.=6.51, mean=10.88, max.=18.92) deg. |
| U-B |
UB |
0.295 |
|
0.040 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=5; phase (min.=6.51, mean=10.01, max.=18.92) deg. |
| Tholen spectral type |
spec_T |
CP |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 2 color indices; used ground-based radiometric albedo |
| SMASSII spectral type |
spec_B |
Xc |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002) |
|
| 247 Eukrate (A885 EB) Discovered 1885-Mar-14 by Luther, R. at Dusseldorf |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
|
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Alternate Designations
| A885 EB = 1947 TA = 1960 TC = A901 TB |
|
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